10 health mistakes to avoid making this winter

All the more reason to sign up to Dry July: A 2015 study found a single bout of binge drinking (typically defined as seven or more drinks in a single session) can put a dent in your immune system function. So if you have a cold or some other infection in your system, your boozy antics could give it a chance to take hold. You don’t need to swear off alcohol altogether this winter, though. Other studies have suggested that red wine (up to two glasses a day) could protect against the sniffles.